Jack



F. C. HEALY.

JACK;

APPLICATION FILED JUNE I I, [920.

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itne se Z22 F. C. HEALY.

JACK.

APPLICATION FILED JUNE 11. I920.

Patented Nov. 22, 1921.

2 SHEETS-SHEET 2- UNITED STATES PATENT OFFICE.

JACK.

Specification of Letters Patent.

Patented Nov. 22, 1921.

Application filed June 11, 1920. Serial No. 388,191.

To all whom it may concern:

Be it known that I, FRANK C. HEALY, a citizen of the United States,residing at South Boston, in the county of Suffolk and State ofMassachusetts, have invented certain new and useful Improvements inJacks, of which the following is a specification.

This invention relates to improvements in jacks, especially designed forlifting automobiles and aims to provide a jack which is capable ofsimultaneously lifting all of the wheels of the vehicle clear of theground.

Another object is the provision of a jack which is adapted to beplacedbeneath :1 vehicle and operated from one side of the latter toentirely lift the said vehicle from the ground and permit it to beeasily turned upon a central pivot, thus providing a portable turn tablein addition to many other ad vantages which the invention possesses.

lVith the above and other-objects in view, the invention furtherincludes the following novel features and details of construction, to behereinafter more fully described, illustrated in the accompanyingdrawings and pointed out in the appended claim.

In the drawings Figure 1 is a View in side elevation showing the jack inposition beneath a motor vehicle, the latter being shown elevated bydotted lines.

Fig. 2 is a plan view of the jack showing the chassis of the vehicle inposition thereon.

Fig. 3 is an end elevation of Fig. 1.

Fig. 4 is a detailed perspective view of the jack frame.

Fig. 5 is an enlarged elevation of the jack with the transverse memberof the jack frame broken away.

Fig. 6 is a sectional view.

Fig. 7 is a detailed section on the line 7-7 of Fig. 6.

Referring in detail to the drawings, wherein like characters ofreference denote corresponding parts, the reference character Jindicates generally a jack which includes a frame, formed of spacedlongitudinal beams L and a transverse connecting beam P, the latterserving to connect the beams L at a point central of their lengths andcarrying blocks B at each end thereof.

The frame is supported upon the jack proper and the latter includes abase memher 1 which is provided with a threaded bore for the receptionof a screw 2. This screw has secured thereto an annular flange 7 whichis provided with an annular groove, the said screw extending beyond theflange through an opening provided in the transverse beam P. Secured tothis beam is a member 8 which is also provided with an annular grooveand this groove together with the groove in the flange form a racewayfor the reception of anti-friction devices 15. The screw 2 is thuspermitted independent rotary movement within the transverse beam P.

In order to prevent the base 1 from turning with the screw, the beam Pcarries a. rod 5 which slides within openings provided in spaced ears 4which extend outwardl from a handle 3 carried by the base. Bind ing nuts6 serve to hold the rod within an opening provided in the beam P.

Mounted upon the upper end of the screw 2 and keyed thereon by means ofa key 9 is a beveled gear 9, the latter engagin a beveled pinion 10which is keyed to a shaft 12 by a key 10. This shaft is mounted inbearings 13 carried by the transverse beam P and has secured upon itsouter end a crank handle 14. The shaft 12 extends through an opening inone of the blocks B and a handle is positioned upon the outside of thelongitudinal beam L so that when the jack is in position beneath thevehicle the handle will extend to one side thereof whereupon the gearsmay be operated to rotate the screw 2 to raise or lower the vehicle.

In practice, the jack is laced beneath the vehicle with the ends 0 thelongitudinal bars L of the jack frame beneath the front and rear axlesand the blocks B beneath the side bars of the vehicle frame, whereuponthe jack screw may be rotated through the crank handle 14 to elevate thevehicle. is desired to turn the vehicle, the rod 5 may be disengagedfrom the beam P by removing one If it of the nuts 6 and allowing the rodto fall.

The vehicle may be then easily turne dwith the screw as a pivot. Theblocks B engage the vehicle side bars so as to prevent bending of thelongitudinal beams L, while the base which is rovided with radialextentions or feet 1' orm a firm support and prevent tilting.

The invention is susceptible of various changes in its form, proportionsand minor details of construction and the right is herein reserved tomake such changes as properly fall within the scope of the appendedclaim. Having described the invention what is claimed 1s:-

A jack embodying a base member having a threaded bore, a screw engagingsaid bore,

a rrame secured to the screw, and including spaced longitudinal bars anda transverse connecting bar, said last mentioned bar being provided withan opening for the passage of the screw, an annular grooved flangeconnected to and surrounding the screw, agrooved disk connected to thetransverse beam and provided with a race-way for anti- 1: frictionmembers, whereby the frame Will be supported upon the screw in a mannerto permit of rotation of the latter and means connected to the screw andextending to one side of the frame, whereby the screw may be 2 rotated;V

In testimony whereof I aflix my signature.

FRANK C. HEALY

